According to state-run People’s Daily, 90 others have been seriously injured in Thursday’s blast, which was so powerful it knocked down nearby factory buildings and shattered the windows of surrounding homes, while apparently triggering a small 2.2-magnitude earthquake.

Numerous others in the vicinity were slightly injured in the blast at a facility run by Tianjiayi Chemical in Yancheng, Jiangsu province, city officials said on their official Twitter-like Weibo account.

“At present, on-site rescue is still going on… The cause of the accident is under investigation,” officials said.